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Add baudrate to FourWire and shorten delay.

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This commit is contained in:
Scott Shawcroft 2019-06-17 17:48:05 -07:00
parent c4170d2f18
commit 4013bcde9e
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GPG Key ID: 9349BC7E64B1921E
3 changed files with 10 additions and 7 deletions
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8
shared-bindings/displayio/FourWire.c
View File

@ -46,7 +46,7 @@
//| Manage updating a display over SPI four wire protocol in the background while Python code runs.
//| It doesn't handle display initialization.
//|
//| .. class:: FourWire(spi_bus, *, command, chip_select, reset=None)
//| .. class:: FourWire(spi_bus, *, command, chip_select, reset=None, baudrate=24000000)
//|
//| Create a FourWire object associated with the given pins.
//|
@ -59,14 +59,16 @@
//| :param microcontroller.Pin command: Data or command pin
//| :param microcontroller.Pin chip_select: Chip select pin
//| :param microcontroller.Pin reset: Reset pin. When None only software reset can be used
//| :param int baudrate: Maximum baudrate in Hz for the display on the bus
//|
STATIC mp_obj_t displayio_fourwire_make_new(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
enum { ARG_spi_bus, ARG_command, ARG_chip_select, ARG_reset };
enum { ARG_spi_bus, ARG_command, ARG_chip_select, ARG_reset, ARG_baudrate };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_spi_bus, MP_ARG_REQUIRED | MP_ARG_OBJ },
{ MP_QSTR_command, MP_ARG_OBJ | MP_ARG_KW_ONLY | MP_ARG_REQUIRED },
{ MP_QSTR_chip_select, MP_ARG_OBJ | MP_ARG_KW_ONLY | MP_ARG_REQUIRED },
{ MP_QSTR_reset, MP_ARG_OBJ | MP_ARG_KW_ONLY, {.u_obj = mp_const_none} },
{ MP_QSTR_baudrate, MP_ARG_INT | MP_ARG_KW_ONLY, {.u_int = 24000000} },
};
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
@ -97,7 +99,7 @@ STATIC mp_obj_t displayio_fourwire_make_new(const mp_obj_type_t *type, size_t n_
}
common_hal_displayio_fourwire_construct(self,
MP_OBJ_TO_PTR(spi), command, chip_select, reset);
MP_OBJ_TO_PTR(spi), command, chip_select, reset, args[ARG_baudrate].u_int);
return self;
}

2
shared-bindings/displayio/FourWire.h
View File

@ -36,7 +36,7 @@ extern const mp_obj_type_t displayio_fourwire_type;
void common_hal_displayio_fourwire_construct(displayio_fourwire_obj_t* self,
busio_spi_obj_t* spi, const mcu_pin_obj_t* command,
const mcu_pin_obj_t* chip_select, const mcu_pin_obj_t* reset);
const mcu_pin_obj_t* chip_select, const mcu_pin_obj_t* reset, uint32_t baudrate);
void common_hal_displayio_fourwire_deinit(displayio_fourwire_obj_t* self);

7
shared-module/displayio/FourWire.c
View File

@ -31,13 +31,14 @@
#include "py/gc.h"
#include "shared-bindings/busio/SPI.h"
#include "shared-bindings/digitalio/DigitalInOut.h"
#include "shared-bindings/microcontroller/__init__.h"
#include "shared-bindings/time/__init__.h"
#include "tick.h"
void common_hal_displayio_fourwire_construct(displayio_fourwire_obj_t* self,
busio_spi_obj_t* spi, const mcu_pin_obj_t* command,
const mcu_pin_obj_t* chip_select, const mcu_pin_obj_t* reset) {
const mcu_pin_obj_t* chip_select, const mcu_pin_obj_t* reset, uint32_t baudrate) {
self->bus = spi;
common_hal_busio_spi_never_reset(self->bus);
@ -45,7 +46,7 @@ void common_hal_displayio_fourwire_construct(displayio_fourwire_obj_t* self,
// of the heap as well.
gc_never_free(self->bus);
self->frequency = common_hal_busio_spi_get_frequency(spi);
self->frequency = baudrate;
self->polarity = common_hal_busio_spi_get_polarity(spi);
self->phase = common_hal_busio_spi_get_phase(spi);
@ -89,7 +90,7 @@ void common_hal_displayio_fourwire_send(mp_obj_t obj, bool command, uint8_t *dat
displayio_fourwire_obj_t* self = MP_OBJ_TO_PTR(obj);
if (command) {
common_hal_digitalio_digitalinout_set_value(&self->chip_select, true);
common_hal_time_delay_ms(1);
common_hal_mcu_delay_us(1);
common_hal_digitalio_digitalinout_set_value(&self->chip_select, false);
}
common_hal_digitalio_digitalinout_set_value(&self->command, !command);